IOS实现验证码倒计时功能(二)

验证码倒计时按钮的应用是非常普遍的,该Blog就和你一起来实现验证码倒计时的效果,定义一个发送验证码的按钮,添加点击事件,具体内容如下

具体代码:

定义一个发送验证码的按钮,添加点击事件

//发送验证码按钮

_sentCodeBtn = [[UIButton alloc] initWithFrame:CGRectMake(kScreenWidth - 27 - 4 - 94, CGRectGetMinY(_registerCodeFD.frame) + 4, 94, 40)];

[_sentCodeBtn setBackgroundColor:colorWithRGBA(0, 191, 191, 0.9)];

[_sentCodeBtn setTitle:@"发送验证码" forState:UIControlStateNormal];

[_sentCodeBtn.titleLabel setFont:[UIFont systemFontOfSize:13.0f]];

//设置圆角

[_sentCodeBtn.layer setCornerRadius:3.0f];

[_sentCodeBtn.layer setShouldRasterize:YES];

[_sentCodeBtn.layer setRasterizationScale:[UIScreen mainScreen].scale];

//发送事件

[_sentCodeBtn addTarget:self action:@selector(sentCodeMethod) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_sentCodeBtn];

监听事件:

//发送验证码

-(void)sentCodeMethod{

NSLog(@"发送验证码。。");

//计时器发送验证码

[self sentPhoneCodeTimeMethod];

//调用发送验证码接口-》

}

//计时器发送验证码

-(void)sentPhoneCodeTimeMethod{

//倒计时时间 - 60秒

__block NSInteger timeOut = 59;

//执行队列

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);

//计时器 -》dispatch_source_set_timer自动生成

dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);

dispatch_source_set_timer(timer, DISPATCH_TIME_NOW, 1.0 * NSEC_PER_SEC, 0 * NSEC_PER_SEC);

dispatch_source_set_event_handler(timer, ^{

if (timeOut <= 0) {

dispatch_source_cancel(timer);

//主线程设置按钮样式-》

dispatch_async(dispatch_get_main_queue(), ^{

[_sentCodeBtn setTitle:@"发送验证码" forState:UIControlStateNormal];

[_sentCodeBtn setUserInteractionEnabled:YES];

});

}else{

//开始计时

//剩余秒数 seconds

NSInteger seconds = timeOut % 60;

NSString *strTime = [NSString stringWithFormat:@"%.1ld",seconds];

//主线程设置按钮样式

dispatch_async(dispatch_get_main_queue(), ^{

[UIView beginAnimations:nil context:nil];

[UIView setAnimationDuration:1.0];

[_sentCodeBtn setTitle:[NSString stringWithFormat:@"%@S后重新发送",strTime] forState:UIControlStateNormal];

[UIView commitAnimations];

//计时器件不允许点击

[_sentCodeBtn setUserInteractionEnabled:NO];

});

timeOut--;

}

});

dispatch_resume(timer);

}

以上是 IOS实现验证码倒计时功能(二) 的全部内容, 来源链接: utcz.com/z/340381.html

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